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A027866
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Numbers k such that k^2 + (k+1)^2 + (k+2)^2 + (k+3)^2 + (k+4)^2 + (k+5)^2 is prime.
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7
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2, 3, 4, 9, 12, 13, 18, 19, 21, 23, 24, 32, 34, 38, 48, 51, 52, 56, 62, 63, 81, 82, 87, 96, 97, 102, 104, 109, 119, 128, 142, 146, 152, 158, 159, 164, 166, 167, 199, 212, 214, 217, 219, 221, 223, 224, 229, 233, 236, 238, 249, 251, 258, 269, 273, 277, 284, 291, 296
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OFFSET
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1,1
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COMMENTS
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Numbers k such that 55 + 30*k + 6*k^2 is prime. - Zak Seidov, May 20 2014
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LINKS
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MATHEMATICA
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Select[Range[300], PrimeQ[6#^2+30#+55]&] (* Harvey P. Dale, Oct 12 2022 *)
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PROG
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(Magma) [n: n in [0..400] | IsPrime(55+30*n+6*n^2)]; // Vincenzo Librandi, Nov 18 2010
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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